From: J.A. Gutierrez (spd@shiva.cps.unizar.es)
Date: Tue Mar 25 2003 - 05:29:32 EST
Sorry for replying to the list, but since I'm adding questions
more than giving answers...
On Mon, Mar 24, 2003 at 01:29:09PM -0600, Pappas, Bill wrote:
> I found a great script for cloning a disk, but I was wondering...is there a
> way to automate the cloning via crontab?
> Here is what I would like to see happen automatically....
> 1. From multiuser mode with networking (init 3) goto single user mode.
> 2. Mount the disks you need
> 3. Perform the clonedisk script shown at MY SCRIPT.
> 4. When dome with #3 go back to init 3
>
> The problem I am having is with step 1. As I dive into single user mode, my
> script is killed as are other processes.
> Therefoe, I never reach step 2
>
> Any suggestions on how I could automate this?
I wouldn't use dd in the first place.
I don't think you can easily automate nothing which requires
single user. (well, maybe modifying inittab; but anyway,
if you could hack it, single user won't make dd good for
cloning the startup disk, since it is still mounted)
I'd use dump/tar/cpio for that purpose; I have a script
for linux and solaris; but I still don't know how to do
some tasks:
- Read partition table from original disk:
SunOS: prtvtoc -h ${ORIG}2
Linux: fdisk -ul $ORIG
Tru64: disklabel -r ????
- Create a new partition table
SunOS: fmthard -s - ${RDEST}2
Linux: sfdisk $DEST
Tru64: disklabel -R ????
(would "disklabel -r $ORIG | disklabel -R $DEST" work?)
- Setting swap
SunOS: not needed
Linux: mkswap `fdisk -l $DEST | awk '/swap$/ {print $1}'`
Tru64: not needed?
- Creating boot loader
SunOS: /usr/sbin/installboot \
/usr/platform/`uname -i`/lib/fs/ufs/bootblk ${RDEST}0
Linux: lilo -v -r /new/1 -b $DEST
Tru64: ????
Problems:
I'm not sure about how advfs work; and in my script
I need to mount the destination filesytems in order to
copy contents.
So, if I have, for instance:
/dev/disk/dsk0a root_domain
and I need to mount /dev/disk/dsk1a, I guess I should
create a new domain (mkfdmn /dev/disk/dsk1a root_domain2)
then a fileset (mkfset root_domain2 root)
Question: this domain/fileset procedure will modify
dsk1 or is just at OS level? i.e., if I physically
disconnect dsk0 and boot from dsk1 (now dsk0), it's
partitions will be part of "root_domain" or of "root_domain2" ?
Once cloned, if I remove "root_domain2", dsk1a contents
will be lost?
BTW; you can find the script at
http://giga.cps.unizar.es/~spd/src/system/do_mirror
I'd like to add Tru64 support, but I'm not sure when I will be
able to test it (I have a single DS10 host, and by now both
disks are in use)
-- finger spd@shiva.cps.unizar.es for PGP / .mailcap tip of the day: / La vida es una carcel application/ms-tnef; cat '%s' > /dev/null / con las puertas abiertas text/x-vcard; cat '%s' > /dev/null / (A. Calamaro)
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